Boise River Basin Feasibility Study

In partnership with the Idaho Water Resource Board (IWRB), Reclamation is conducting a $6M feasibility study to evaluate increased storage in the reservoirs behind Reclamation’s Anderson Ranch and Arrowrock Dams, and the United States Army Corps of Engineers’ Lucky Peak Dam. IWRB has committed to provide $3M as the non-Federal partner.

Approximately 78% of active capacity in the three reservoirs is contracted for irrigation purposes. The remaining capacity is used for municipal and industrial uses, flow augmentation for endangered species, winter streamflow maintenance, and flood control. The reservoirs are operated as a system to provide flood control, and additional benefits include hydropower and recreation.